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Finding the Fourth Proportional to 70,864.60, 106,308.36 and 20,949.70

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Solution

The fourth proportional to 70,864.60, 106,308.36 and 20,949.70 is: 31,427.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,864.60 : 106,308.36 = 20,949.70 : x
  2. Step 2: Convert to fraction form
    70,864.60/106,308.36 = 20,949.70/x
  3. Step 3: Cross multiply
    70,864.60x = 106,308.36 × 20,949.70
  4. Step 4: Simplify right side
    70,864.60x = 2,227,128,249.49
  5. Step 5: Solve for x
    x = 2,227,128,249.49/70,864.60
  6. Step 6: Final answer
    x = 31,427.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.